I am all for Hillary going to war with MSNBC and Shuster,
It is her choice to use whatever power she has, as she likes.  The comment was crude, sexist, and junk commentary. If she can put a squeeze on the big media, she might as well.

On the other hand, Chelsea is a grown woman who has chosen to put herself in the public eye by campaigning for her parent.  As such, I believe she is fair game, as are Hillary and Bill.